well what i idd was attach it with the bungy chords, and then i took a chain, wrapped it around the tree, and locked both sides to the view finder thingy at the top. if yours has it... For a better explanation is i put the lock thru the viewfinder thingy at the top, then wrapped a chain around and put ends in the lock and closed it, it has worked for me but if someone REALLY wanted it, they could steal it no matter what system you had!!